Which of the following expressions represents a function?

a.{(1, 2), (4, –2), (8, 3), (9, –3)}
b. y2 = 16 − x2
c.2x2 + y2 = 5
d. x = 7

(1, –1), (16, –4), (36, –6)

step-by-step explanation:

given that the function is

this can also be written as

we have to graph this function and check which list of points lie on the graph

see attachment for graph:

we find that the points lying are (1,-1) (16,-4) and (36,-6)

since square root is there we find that x can only be posiitve but y can be since square root both positive and negative.

there is no points to select.

step-by-step explanation:

25/6

step-by-step explanation:

you multiply 4 by the denominator (4*6=24) and add it to the numerator which makes it 25/6.